Synthesis of an Sp-Carbon-Rich Carbonaceous Material Exhibiting Distinctive Anode Performance

Area of Science:

• Materials Science
• Nanotechnology
• Electrochemistry

Background:

• Carbyne, an allotrope of carbon with sp-hybridized atoms, possesses unique properties but is challenging to synthesize.
• Existing synthesis methods for carbyne and its analogs are limited, hindering research and application.

Purpose of the Study:

• To develop a straightforward synthesis method for carbyne-based materials.
• To explore the potential of these materials in energy storage applications, specifically lithium-ion batteries.

Main Methods:

• A one-pot coupling reaction using trimethylsilylacetylene (TMSA) as a precursor.
• Utilized a copper catalyst to facilitate bond cleavage and subsequent coupling reactions.
• Characterized the synthesized TMS-capped sp-carbon material (TMS-C) for its structural and electrochemical properties.

Main Results:

• Successfully synthesized TMS-C containing over 92 continuous sp-hybridized carbon atoms.
• The TMS-C material demonstrated an impressive reversible capacity of ~3219 mA h g⁻¹ in a lithium-ion half-cell at 50 mA g⁻¹.
• Achieved stable cycling performance with 8865 cycles at a high current density of 5000 mA g⁻¹.

Conclusions:

• The proposed synthesis method is effective for producing carbyne-based materials.
• The high electrochemical performance indicates significant potential for TMS-C in advanced lithium-ion battery technology.
• This work highlights the promise of multi-bond-cleaving reactions for synthesizing novel carbonaceous materials.